COMMINUTING DEVICE

Abstract

A comminuting device for solids-conducting liquids includes a housing with an inlet opening, an outlet opening and a housing interior space which extends from the inlet opening to the outlet opening. A first comminuting shaft arranged for rotation about a first comminuting shaft axis, and a second comminuting shaft arranged for rotation about a second comminuting shaft axis through the housing interior space. A first screen device is arranged in the housing interior space adjacently with respect to the first comminuting shaft with a first screen wall having a multiplicity of slots. A first evacuating device with a plurality of evacuating elements which can be moved along a movement path relative to the screen wall extends through the plurality of slots on at least one portion of the movement path.

Claims

1-18. (canceled)

19. A comminuting device for solids-conducting liquids comprising: a housing with an inlet opening, an outlet opening and a housing interior space which extends from the inlet opening to the outlet opening; a first comminuting shaft extending through the housing interior space and arranged for rotation about a first comminuting shaft axis, to which a multiplicity of first comminuting cutting elements which are spaced apart axially along the first comminuting shaft axis are fastened; a drive device for driving the first comminuting shaft in a rotational movement; a comminuting flow path extending through the interior space from the inlet opening around the comminuting shaft to the outlet opening; a first screen device arranged in the housing interior space adjacently with respect to the first comminuting shaft with a first screen wall having a multiplicity of screen wall openings and a first evacuating device for removing blockages from the screen wall openings, the first screen device and the first evacuating device being movable relative to one another; and a bypass flow path running in parallel to the comminuting flow path and extending through the screen wall openings from the inlet opening to the outlet opening; wherein the first evacuating device is formed by at least one first brush element with a multiplicity of brush hairs, the first screen wall and the first brush element being movable relative to one another, and the brush hairs engaging at least partially into the screen wall openings during relative movement of the first brush element with respect to the first screen wall.

20. The comminuting device as claimed in claim 19, wherein a second comminuting shaft extends through the housing interior space, is arranged for rotation about a second comminuting shaft axis, and to which a multiplicity of second comminuting cutting elements which are spaced apart axially along the second comminuting shaft axis are fastened, the drive device being configured to drive the second comminuting shaft in a rotational movement.

21. The comminuting device as claimed in claim 19, wherein the first screen device is configured as a screen drum about a screen drum axis, the screen drum having a circumference on which the first screen wall is arranged.

22. The comminuting device as claimed in claim 19, wherein an evacuating drive device is coupled to the first screen device or the first evacuating device for the generation of a relative movement between the first screen device and the first evacuating device.

23. The comminuting device as claimed in claim 21, wherein the screen drum is mounted rotatably about the screen drum axis, and an evacuating drive device is coupled to the screen drum in order to drive the screen drum in a rotational movement about the screen drum axis.

24. The comminuting device as claimed in claim 21, wherein the screen drum is arranged adjacently with respect to the first comminuting shaft, and the first screen wall extends, starting from the region which adjoins the first comminuting shaft, over an inlet circumferential angle which defines the circumferential portion of the screen drum, via which fluid which flows in through the inlet opening can flow through the first screen wall into the screen drum, and the first screen wall is divided into a plurality of screen wall segments, of which at least one screen wall segment extends over a segment circumferential angle about the screen drum axis which is less than or equal to the inlet circumferential angle; or the screen drum is arranged adjacently with respect to the first comminuting shaft, and the first screen wall extends, starting from the region which adjoins the first comminuting shaft, over an outlet circumferential angle which defines the circumferential portion of the screen drum, via which fluid which flows to the outlet opening can flow out of the screen drum through the first screen wall, and the first screen wall is divided into a plurality of screen wall segments, of which at least one screen wall segment extends over a segment circumferential angle about the screen drum axis which is less than or equal to the outlet circumferential angle.

25. The comminuting device as claimed in claim 24, wherein the screen drum has a screen drum frame to which the screen wall segments are fastened, and in that the at least one screen wall segment is fastened releasably to the screen drum frame and can be unfastened radially to the outside in relation to the screen drum axis.

26. The comminuting device as claimed in claim 25, wherein the screen wall segments are fastened in an outer circumferentially flush manner to the screen drum frame, such that the outer surface of the screen wall segments is arranged about the screen drum axis at a radius which is greater than or equal to the radius of a proportion of the screen drum frame which projects to the outside; or the screen wall segments are fastened in an outer circumferentially flush manner with respect to one another to the screen drum frame, such that the outer surface of the screen wall segments covers the screen drum frame completely.

27. The comminuting device as claimed in claim 21, wherein: the screen drum is mounted in the housing by means of two opposed axle stubs such that the screen drum can be rotated about the screen drum axis; and the axle stubs can be dismantled from the interior space of the screen drum or from outside the housing.

28. The comminuting device as claimed in claim 21, wherein after dismantling of a drum axis mount, the screen drum can be removed from the housing through the inlet opening or outlet opening in a radial direction in relation to the screen drum axis.

29. The comminuting device as claimed in claim 21, wherein: the screen drum is mounted in the housing rotatably about the screen drum axis at a first end by way of a first rotary bearing and at a second end by way of a second rotary bearing; and the first or the second rotary bearing is a plain bearing.

30. The comminuting device as claimed in claim 22, wherein the evacuating drive device comprises: hydrodynamically acting fluid guiding elements which are arranged in the interior space and are flowed onto by a liquid flow flowing through the interior space; or an electrically, pneumatically or hydraulically driven motor.

31. The comminuting device as claimed in claim 19, further comprising a second comminuting shaft between the first screen device and a second screen device, the second screen device comprising a second screen wall having a plurality of openings, and a second evacuating device with at least one second brush element with a multiplicity of brush hairs, the second screen wall and the second brush element being movable relative to one another, and the brush hairs engaging at least partially into the screen wall openings of the second screen wall in the case of a relative movement of the second brush element with respect to the second screen wall.

32. The comminuting device as claimed in claim 31, wherein the relative movement between the first screen wall and the first brush element and the relative movement between the second screen wall and the second brush element take place synchronously by means of a mechanical coupling to a common evacuating drive device.

33. The comminuting device as claimed in claim 19, further comprising a second comminuting shaft extending through the housing interior space and arranged for rotation about a second comminuting shaft axis, to which a multiplicity of second comminuting cutting elements which are spaced apart axially along the second comminuting shaft axis are fastened, wherein an axial spacing between the first and second axially adjacent comminuting cutting elements is at least as great as twice as great as the ball passage of the openings in the screen walls.

34. The comminuting device as claimed in claim 19, wherein each of the openings or at least the plurality of the openings in the first screen wall extend in the circumferential direction over a length which is different by not more than 50% from an extent of the opening in the axial direction in relation to the screen drum axis.

35. The comminuting device as claimed in claim 19, further comprising a second comminuting shaft extending through the housing interior space and arranged for rotation about a second comminuting shaft axis, to which a multiplicity of second comminuting cutting elements which are spaced apart axially along the second comminuting shaft axis are fastened, and wherein the first and second comminuting shafts are driven in an opposed rotational direction, and the first and second comminuting shaft axis run parallel to one another and spaced apart from one another.

36. The comminuting device as claimed in claim 19, wherein the first screen wall has a curved screen wall surface which defines a cylindrical surface around the first screen drum axis.

37. A comminuting device for solids-conducting liquids comprising: a housing with an inlet opening, an outlet opening and a housing interior space which extends from the inlet opening to the outlet opening; a first comminuting shaft extending through the housing interior space and arranged for rotation about a first comminuting shaft axis, to which a multiplicity of first comminuting cutting elements which are spaced apart axially along the first comminuting shaft axis are fastened; a second comminuting shaft extending through the housing interior space and arranged for rotation about a second comminuting shaft axis, to which a multiplicity of second comminuting cutting elements which are spaced apart axially along the second comminuting shaft axis are fastened, wherein the first and second comminuting shaft axis run parallel to one another and are spaced apart from one another; a drive device for driving the first and second comminuting shafts in a rotational movement; a comminuting flow path extending through the interior space from the inlet opening around the comminuting shaft to the outlet opening; a first screen device arranged in the housing interior space adjacently with respect to the first comminuting shaft with a first screen wall having a multiplicity of screen wall openings and a first evacuating device for removing blockages from the screen wall openings, the first screen device and the first evacuating device being movable relative to one another; and a second screen device arranged in the housing interior space adjacently with respect to the second comminuting shaft with a second screen wall having a multiplicity of screen wall openings and a second evacuating device for removing blockages from the screen wall openings, the second screen device and the second evacuating device being movable relative to one another; and a bypass flow path running in parallel to the comminuting flow path and extending through the screen wall openings from the inlet opening to the outlet opening; wherein the first and second evacuating devices are formed by at least one brush element with a multiplicity of brush hairs, the screen wall openings of each of the first screen wall or second screen wall and the first brush element being movable relative to one another, respectively, and the brush hairs engaging at least partially into the screen wall openings during relative movement of the first brush element with respect to the first screen wall or the second screen wall.

38. A comminuting device for solids-conducting liquids comprising: a housing with an inlet opening, an outlet opening and a housing interior space which extends from the inlet opening to the outlet opening; a first comminuting shaft extending through the housing interior space and arranged for rotation about a first comminuting shaft axis, to which a multiplicity of first comminuting cutting elements which are spaced apart axially along the first comminuting shaft axis are fastened; a drive device for driving the first comminuting shaft in a rotational movement; a comminuting flow path extending through the interior space from the inlet opening around the comminuting shaft to the outlet opening; a first screen device arranged in the housing interior space adjacently with respect to the first comminuting shaft with a first screen wall having a multiplicity of screen wall openings and a first evacuating device for removing blockages from the screen wall openings, the first screen device and the first evacuating device being movable relative to one another; and a bypass flow path running in parallel to the comminuting flow path and extending through the screen wall openings from the inlet opening to the outlet opening; wherein the first evacuating device is formed by at least one first brush element with a multiplicity of brush hairs, the first screen wall and the first brush element being movable relative to one another, and the brush hairs engaging at least partially into the screen wall openings during relative movement of the first brush element with respect to the first screen wall; wherein the first screen device is configured as a screen drum about a screen drum axis, the screen drum having a circumference on which the first screen wall is arranged and the screen drum comprising a plurality of screen wall segments; and wherein the screen drum is mounted in the housing by means of two opposed axle stubs such that the screen drum can be rotated about the screen drum axis, the axle stubs are accessed by removal of one of the plurality of screen wall segments, and the axle stubs may be dismantled from the interior space of the screen drum.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In the following text, one preferred embodiment of the invention will be explained on the basis of the appended figures. The following figures show the preferred embodiment of the comminuting device according to the invention in different views and perspectives. In the figures:

[0041] FIG. 1 shows a perspective view obliquely from the front and side of a comminuting device according to the invention;

[0042] FIG. 1a shows a perspective view of the circled detail denoted by “A” from FIG. 1;

[0043] FIG. 1b shows a perspective view of the circled detail denoted by “B” from FIG. 1a;

[0044] FIG. 1c shows a perspective view of the circled detail denoted by “C” from FIG. 1a;

[0045] FIG. 2 shows a perspective side view of the comminuting device according to the invention according to FIG. 1 with a dismantled screen drum;

[0046] FIG. 3 shows a front view of a housing interior space of the comminuting device according to the invention according to FIG. 1 with a removed screen drum;

[0047] FIG. 3a shows a perspective view of the circled detail denoted by “A” from FIG. 3; and

[0048] FIG. 3b shows a perspective view of the circled detail denoted by “B” from FIG. 3.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] FIGS. 1, 2, and 3 show a housing 10 with a housing interior space 10 of a comminuting device according to the invention. The comminuting device has a first comminuting shaft 11 and a second comminuting shaft 12 (concealed in FIG. 1) mounted in the housing interior space 10a rotatably about a first and second comminuting shaft axis 100, 200, respectively, within the housing 10. The first comminuting shaft 11 and the second comminuting shaft 12 have a plurality of comminuting cutting elements which are configured on cutter disks 111, 112 and spaced apart axially along a first and a second comminuting shaft axis, respectively. Both the first comminuting shaft 11 and the second comminuting shaft 12 consist of a plurality of cutter disks 111, 112. The housing interior space 10 includes an inlet opening 13 and an outlet opening 14, through which solids or liquids which are loaded with solids can be fed to the housing interior space and can be discharged therefrom. The comminuting shafts 11, 12 extend in a vertical direction in the housing interior space in the installed position.

[0050] The two comminuting shafts 11, 12 rotate at a different rotational speed, with the result that, in the case of every revolution, different comminuting cutting elements of adjacent cutter disks 111, 112 of the two comminuting shafts 11, 12 come into engagement with one another, and a shearing action is achieved between the comminuting cutting elements.

[0051] A gear mechanism 20 is arranged in a gear mechanism space, which gear mechanism 20 consists of two gearwheels with a different number of teeth which are fastened directly on the comminuting shafts 11, 12 in a torque-transmitting manner and mesh with one another. As a result, an opposed rotational movement of the two comminuting shafts 11, 12 is produced, the two comminuting shafts 11, 12 running at a different rotational speed. One of the two comminuting shafts 11 or 12 is guided out of the housing interior space, and can be set in rotation by means of a drive motor 25. This rotation is transmitted by way of the gear mechanism 20 to the other comminuting shaft 11, 12. As a result, the first comminuting shaft 11 rotates about a first comminuting shaft axis, and the second comminuting shaft 12 rotates about a second comminuting shaft axis in an opposite rotational direction. The first comminuting shaft axis and the second comminuting shaft axis run parallel to and spaced apart from one another.

[0052] In each case, eight comminuting cutting elements which are distributed homogeneously in the circumferential direction are configured on the circumference of each cutter disk 111, 112. The comminuting cutting elements form helical curves of a thread with a steep lead along the circumference of each comminuting shaft 11, 12. The comminuting cutting elements of one comminuting shaft form a left-handed thread, and the comminuting cutting elements of the other comminuting shaft form a right-handed thread.

[0053] A first screen drum 30 is arranged adjacently with respect to the first comminuting shaft 11, which first screen drum 30 is mounted in the housing such that it can be rotated about a first screen drum axis 300. The first screen drum 30 comprises a first screen wall 31 which has a cylindrical surface and is formed by way of a total of three screen wall segments 31a-c. Each screen wall segment has a multiplicity of openings 32.

[0054] The screen drum 30 is set in rotation about the screen drum axis 300 by means of a drive motor 35 via a gear mechanism 36.

[0055] A brush element 50 (shown in greater detail in FIGS. 1a and 1c) lies adjacently with respect to the first screen drum 30 and extends parallel to the first screen drum axis 300. The brush element 50 is arranged on and fastened to the outer edge of the housing. It comprises a multiplicity of brush hairs, and is arranged at a spacing from the first screen drum axis 300 such that the brush hairs sweep over the outer surface of the screen wall 31 and protrude to a small extent into the openings 32. If the screen drum is rotated about the screen drum axis, the brush hairs therefore free the openings of solids situated therein, and keep the openings free as a result.

[0056] In an analogous manner with respect thereto, a second screen drum 40 is mounted adjacently with respect to the second comminuting shaft 12 and such that it can be rotated about a second screen drum axis 400, and a second brush element is arranged adjacently with respect thereto. In FIG. 2, the mounting position of said second brush element is denoted by way of the designation 60. The second screen drum 40 and the second brush element at the mounting position 60 are of mirror-symmetrical configuration about a mirror plane, lying between the two comminuting shafts, with respect to the first screen drum 30 and the first brush element 50, and comprise a second cylindrical screen wall 41 which is likewise formed from three screen wall segments 41a-c which in each case have a multiplicity of openings 42.

[0057] The comminuting shaft axes 100, 200 and the screen drum axes 300, 400 are arranged parallel to one another and extend transversely with respect to the throughflow direction of the housing from the inlet opening to the outlet opening.

[0058] The cylinder surfaces of the first and the second screen wall 31, 41 in each case form a convex outer surface. An angular region of approximately 120° of the cylinder surface of the first screen drum 30 about the drum longitudinal axis 300 points toward the inlet opening, and is delimited by way of the first brush element 50 and the first comminuting shaft 11 which lies adjacently with respect to the first screen drum 30. In the same way, an angular region of approximately 120° of the cylinder surface of the second screen drum 40 about the screen drum axis 400 points toward the inlet opening, and is delimited by way of the second brush element at the mounting position 60 and the second comminuting shaft 12 which lies adjacently with respect to the second screen drum 40.

[0059] As shown in detail in FIG. 1B, the screen wall segments 31a-c and 41a-c are fastened releasably to a first and second screen drum frame 38, respectively, in each case by means of a plurality of screws 37. The screen drum frame 38 is formed by way of end-side round end plates and by way of three longitudinal struts which extend axially in the region of the outer circumference. Each screen wall segment 31a-c, 41a-c extends over a circumferential angle of 120° around the drum longitudinal axis 300 and 400, respectively. After the screw fastening is released, a screen wall segment can therefore be taken off from the screen drum which is mounted in the housing from the screen drum frame toward the inlet opening, and can be removed through the inlet opening, as shown in FIG. 2.

[0060] As a result of the removal of a single screen wall segment 31a-c or 41a-c, the interior space of the screen wall drum 30, 40 becomes accessible. As shown in detail in FIGS. 3a and 3b, the screen wall drum 30 is mounted in an upper anti-friction bearing 18 and a lower plain bearing 19 in the housing by way of an upper axle stub 38 and a lower axle stub 39, such that it can be rotated about the screen drum axis 300. The axle stubs 38, 39 are fastened releasably to the respective upper and lower end plates of the screen drum frame by means of screws 38a, 39a. After this screw connection is released, the axle stubs 38, 39 can be pulled axially out of the bearings 18, 19 into the interior space of the screen drum, as a result of which the rotary guidance and securing of the screen drum in the housing is canceled. As a result, the first screen drum 30 can be removed in the radial direction from the housing through the inlet opening, as shown in FIG. 2.

[0061] This dismantling possibility is realized accordingly in the same way for the second screen drum 40.